You can also buy brake bleeding wrenches for the bleed fitting. They have a 6 point full box end with a funky angled shape to better get into tight spots. This makes it easy as the bleed hose will fit onto the bleed fitting above the wrench so you can loosen and tighten the fitting without taking the hose off. I believe that my car is 9mm. Don Hoefer '82 Coupe